Neat how the iTunes music store lets you choose your level of depth in a genre (i.e. The Basics, Next Steps, Deep Cuts, or Complete Set). You can dip your toe or dive all the way in.

Reminds me of how video games allow players to compete at a beginner level or a more advanced level. That keeps people coming back for more. You can be a newbie or an expert and still get something out of it.

Apps, on the other hand, usually offer a one-size-fits-all interface. It’s a compromise that tries to find a decent meeting point that’s not too tough for beginners but not too dumbed-down experts. That’s a sweet spot that can be tough to find though.